Combined radio and phonograph amplifier and tone control therefor



nec, 30.v i924. 1,521,366

A. H. HAAG COMBINED RADIO `AND PHONOGRAPH AMPLIFIER AND TONECONTROL THEREFOR Dec, 30. 1924.

' A. H. HAAG COMBINED RADIO AND PHONOGRAPH AMPLIFIER AND TONE CONTROL THEREFOR Filed Jan. 14

HHHHHHHH 4.5 oPHON() Dec, 30. 1924. 1,521,366

A. H. HAAG COMBINED RADIO AND PHONOGRAPH AMPLIFIER AND TQNE- CONTROL THEREFOR Filed Jan. 14 1924 `3 Sheets-Sheet 5 .9. A 6 Owl/Al'. S19/'76.3 WM

r1 35/ 3 3/ INVENTOR:

Patented Dec. 30, 1924.

- UNITED STATES ALFRED H. HAAG, OF BALTIMORE, MARYLAND.-

COMBINED RADIO AND PHONOGRAPH AMPLIFIER AND TONE CONTROL THEREFOR.

Application filed January 14, 1924. Serial No. 686,109.

To all whom t 'may concern:

Be it known that I, ALFRED H. HAAG, a citizen of the United States. residing at the corner of Manhattan and Stuart Avenues,

Mt. Washington Heights, Baltimore Md.,

county of Baltimore City, State of Mary land, have invented a new and useful Combined Radio and Phonograph Amplifier and Tone Control Therefor, of which following is a specification.

My invention consists of a novel construction of a combined radio and phonograph amplifier, wherein the radio and phonograph elements are collocated at conveniently accessible heights, and a common amplifier is provided having a novelV modulating device, which is frictionally retained in its desired extreme or intermediate positions, so as effectively to control both the radio and phonograph reproductions.

1t further consists of a novel construction of a rear casting or amplifier element having oppositely directed branches, Whose upper and lower flanges contact with the r motor board and radio support, so as to 'form an effective brace therefor.

It further consists of a novel construction of valvularlelement or tone modulator common, to the radio and phonograph elements, and a novel means of pivotally mounting the same in the amplifier casting.

It further consists of novel mean-s for arresting its movement at its eXtreme positions, and of a novel frictionally retained locking device for actuating' the tone modulator land retaining it in lthe desired position.

It further consists of other novels features of construction and advantage, all as will be hereinafter pointed out.

For the purpose of illustrating my invention, I have shown in the accompanying' drawings one form thereof which is at present preferred by me since the sam'e will give in practice satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists may be variously arranged and organized andthat my invention 'is not limited to the .precise arrangement and organization .of these instrumentalities as herein shown and described.

' Figurel represents a perspective view oi a, cabinet employed in carrying out my invention.

Figure 2 represents a vertical section on line 2 2, Figure 1.

Figure 3 represents a vertical section on line 3-3, Figure 1.

Figure 4 represents on an enlarged scale a horizontal section on line 4-4 Figure 6.

Figure 5 represents a front view of Figure L1, showing the grill and the manner of guiding the tone modulator adjusting device.

Figure 6 represents a section on line 6 6, Figure 4, showing the manner of hinging and actuating the tone modulator. Figure 7 represents a vertical sectional view of-a modification. Figures 8 to 12 represent details.

Similar numerals of reference indicate corresponding parts.

Referring to the drawings;-

In carrying out my invention I provide a novel construction of cabinet 1, having the sides 2, removable back 3, stationary top or portions 4, and central lid 5, hinged at 6, to the rear of the cabinet. 7 designates the motor board whereby the talking machine chamber 8 is formed between the latter and the lid 5. 9 designates the lower partition or radio support between which and the motor board is formed the amplifier chamber 10, in front of which is located the radio chamber 11, formed within the back vertical wall 12 and the horizontal top wall 13. rlihe front of the radio chamber is closed by the long drop door 14 which is hinged at 15, so as to be turned outwardly and dropped into a horizontal position when it is desired to get access to the radio chamber and its adjuncts. The radio panel may be horizontal as indicated at 16, or it may stand vertically in front of the radio chamber if desired. The talkingmachine elements in the chamber 8 comprising the turnv table 17, spindle 18, sound box 19, tone arm 20, and its coupling 21 are of the usual character, but especial attention is directed to the novel construction of amplifier common to both the talking machine and radio.

Thel amplifier 22 is composed of a duplex rear casting or tubular frame having the upper conduit. 23 whose upper flange 24 bears on the under side of the motor board 7, in alignmentwith the t'one arm coupling fiange 21 above. while its lower conduit 25, terminates in the radio receiver flange 26, which bears on the top of the bottom partitionor radio support 9. The two conduits 23 and 425 flare outwardly and meet in the common offset flange 27 in which is received the rear end of the common amplifier 28, whose contour will be understood from F iv'ures 2 and 4. 29 designates an adjustable valvular member or leaf which has the dual function of a sound deflector and tone modulator, and v is hinged or pivotally mounted at 30 as will be understood from Figure 4. The side edges of the element 29 flare outwardly as seen in Figure 4, and to its front is secured the flanged aligning or guide clip 3l, through which passes the stem 32,I Whose front end projects through the slot 33 of the front guide plate 34, carried by the grill 35. The knob 36 is screwed into or upon the front end of the stem 32 and its rear periphery is in contact with the front walls of the guide Vslot 33. The

o rear end 37 of the stem 32 is threaded and carries the nutr38 and washer 39, against which abuts one end of the spring 40, the other end of the latter abutting against the' contiguous flange of the clip 31. Especial attention is called to the manner of pivoting or hinging the rear end of the tone modulator in its curved seat 41, as seen in Figure 6, since an effective joint is formed at this point and the upper pair of side battens 42 and the lower pair of side battens 43, as seen in Figure 3, not only form stops for the tone `modulator but also prevent the sound reproductions from leaking by the side edges of the tone'modulator, when in either of its extreme positions. The modulator is effectively guided in its movements during its manual adjustment, by reason of its rear pivotal connection and by reason of.A the tension ofi the spring 40, which constantly pulls the rear of the knob 36 into frictional contact with the contiguous walls of the slot 33. Near the upper terminal of the guide slot 33 I place the radio name plate 44, and at the bottom of said slot the phonograph name plate 45, so that the operator can instantly see that when the radio is functioning, the knob 36 is at or near the radio name plate and whenthe phonograph is functioning the knob is at or near the phono name plate; The front of the cabinet is provided withthe outer central tone v modulating doors 46 which may be omitted if desired and with the outer side doors 47, which give access to the record files and ample space is provided in the amplifier chamber yl0 for the radio batteries and the wiring and other radio appurtenances, as is evident, so that the entire internal capacity of the cabinet is utilized. The drop door 14 is so positioned that when it is o ened into the horizontalV position seen in igure Y l, it not only gives ready access to the radio controls, but also affords a convenient rest for the wrists of the operator, while tuning g; in and making the various adjustments of the radio controls. When the ldrop, door` stands horizontal as seen dotted in Figure 7, its height from the floor is about two feet, which enables the operator to make the radio adjustments While sitting down. The phono- A graph elements are about forty-six inchesl .from the floor which brings the tone arm and sound box at a conveniently accessible height, and the doors 46 and grill 35 are positioned so that the so'und reproductions are directed from the cabinet atsuch a. height as to secure the best acoustical results.

It will be apparent that by positioning the hinge of the tone modulator as far back as possible, and by prolonging the length ,lof said modulator' to about the point shown,` I have made provision for' said modulator not only to function as a movable or adjustable Wall for both the radio and phonogra h amplifier, but also as a tone modulator or either or both amplifiers, as it will be apparent that a slight outward pull on the knob, releases the latter from its frictional contact with the walls of the vertical slot, so that the modulator can be adjusted into either of its extreme. positions, and the sound reproductions o f either or both instruments, can be instantly modulated to the desired extent by moving the knob up or down, and upon releasing the knob, the spring will cause it frictionally to engage the wall of the slot and the knob and its adjuncts will be retained in the desired position. It will be apparent that by the employment of the hinge 30, and by positioning of the modulator with reference to the inlets 23 and 25 as described, one surface of the modulator forms a. substantially unbroken continuity of a Wall of the conduit 25, while the other surface of the modulator forms a substantially unbroken continuity of a wall ofthe conduit 23, as Will be seen from Fig. 2, so when either the radio or the phonograph is functioning, 'tion of the sound waves is effected at all times. It will be obvious that the internal capacity of the cabinet is such that ample space is provided for the radio batteries which are at the same time readily accessible and the wiring and other connections vcommon to the radio elements are entirely concealed. When the top of the cabinet is closed, and the radio drop door is open, it has the appearance of a radio cabinet exclusively and when the radio drop door is closed and the central lid is opened, it has the appearance of a. phonograph exclusively.

I have deemed it Yunnecessary to describe in detail the radio receiving set or its connections to the receiver element 2G, as my invention is adapted to house any standard set, one form thereof being shown in Figures 1 and 2, Where the radio panel 16 is horizontal. In Figure 7, I have shown the radio panel 48 as standing vertical, being the proper amplificasecured to its base 49, so that when the drop door 14 is open and stands horizontal the .radiopelements can be readily pulled forwardly into the position seen dotted, in case of any necessity for inspection or repairs. The constructionof the duplex amplifier, tone modulator and their adjuncts seen in Figure 7, is the same as already described.

In Figure 7, I have shown the modulator 29,v in the position the parts aume when thev phonographic appliances areomitted', and

I have made slight changes in the rear sound amplifier casing 49, which has its upper and `lower branches l and 51 symmetrical and of the same length and discharge unto the common amplifier 52, which is provided with the tone modulator 53, hinged or pivoted at 54 in the manner already described. The stem 55 is resiliently mounted, as already described, upon the member 53, and has the shoulder 56, which engages the walls of the slot 57 in the curved strip 58, in the mouth of the amplifier, which may be of Wood or other material, having its radius of curvature struck from the point 54. The spring 40 keeps the shoulder 56 always in contact with the front of the curved strip 58 and no pressure or tension is exerted on .the grill 35. 59 designates the radio chamber' formed between -t-he rear vertical wall 60, and the top horizontal wall 61, which is extended to the cabinet back 62. The radio receiver 63 is supported on the bottom partition 64 and the radio amplifier 65, bridges the space between the partitions 64 and 61. The rear casting 49 bridges the space between the partition 61 and the cab-inet top 66, and the flanges 67 and 68, may be secured together by fastening devices common thereto which pass through the partition 61, whose front end may be rabbetted in the horizontal front rail 69. The radio receiving apparatus may be carried by a horizontal panel as seen iny Figure 8, or by a vertical panel as seen in Figure 9. The rear amplifier casting 49 may be made as seen in Figure 9, or in Figure 2, and for some reasons I preferably employ the construction seen in Figure 9, although it will be a-pparent that both constructions will function with equal effectiveness.

, It will now be apparent that I have devised a novel and useful combined radio and' embodiment thereof which will give in practice satisfactory and reliable results, it is to be understood that such embodiment is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what I claim as new'and desire to secure by Letters Patent, is

1. In a device of the character stated, a sound amplifier, a plurality of rear inlets therefor and a tone modulator pivotally secured at its rearat the junction of said rear inlets, said modulator extending longitudinally through said amplifier.

2. In a device of the character stated, a sound amplifier, a plurality of rear inlets therefor, a tone modulator pivotally secured at its rear at the junction of said rear inlets, said modulator extending longitudi-v nally of said amplifier, and means fo-r retaining said-modulator in its desired adjusted position.

3. In a device of the character stated, a sound amplifier, a plurality of rear inlets therefor, whose walls are converged towards their junction with the rear of said amplifier, and a tone modulator substantially coeXtensive with said amplifier and' pivotally secured at its rear atthe junction of said rear inlets whereby rsaid modulator-serves as an adjustable wall forming an unbroken continuity of one wall of the sound exit passage it controls.

4.l In a device of the character stated, a sound amplifier, a plurality of rear inlets therefor, a tone modulator substantially coextensive with said amplifier atid pivotally secured at its rear at l-the junction of said rear inlets. a slotted guide at the front of said amplifier, and means coacting with said slotted guide for frictionally retaining said modulator in its adjusted positions.

5. In a device of the character stated, a sound amplifier, a plurality of converging rear inlets therefor, sound reproducing devices connected with said inlets, a tone modulator, pivotally secured'at its`rear at the apex of the angle formed at the junction of said rear inlets', said modulator forming a continuity of the juxtaposed wall of the sound exit passage for whichever of said sound reproducing devices it controls.

6. In a device of the character stated, a cabinet having oppositely located partitions, Sound reproducing mechanisms supported by said partitions, a sound amplifier positloned intermediately of said partitions, a plurality of rear converging sound conduits leading from said sound reproducing mechanisms to said amplifier and having their outer ends secured to said partitions and a tone modulator, substantially co-extensive with said amplifier, and pivotally secured at its rear at the junction of said sound conduits at the rear of said amplifier.

7. Ina device of the character stated, a sound amplifier, a plurality of rear inlets therefor, a tone modulator extending through said amplifier and ivotally secured at its rear at the junction o said rear inlets, and an upper and lower pair of outwardly diverging battens extending from near the pivotal point of said modulator to the outer portion of said amplifier.

8. In a device of the character stated, a sound amplifier, having its front end unobstructed, a rear inlet therefor, a tone modulator extendinglongitudinally of said amplifier and of a length substantially co-extensive with the latter, a pivotal connection for the rear of said modulator positioned in the rear of said amplifier in proximity to the junction of said inlet therewith, said modulator having its Outer edges diverging outwardly' and in all its positions forming a continuation of a Wall of said inlet and means for retaining said modulator in its adjusted positions ALFRED H. HAAG. Witnesses:

E. H. FAIRBANKs, CHARLES ROUX. 

